Study On Numerical Simulation And Monitoring Data Analysisfor A Deep Foundation Pile-anchor Of Guangzhou Panyu District

In China, the process of urbanization and the high-rise buildings is increasing, The use of land become less and less, the use of underground space is become more and more, a large number of underground struction has brought the rapid development of deep foundation pit engineering.Deep foundation pit engineering is a complex and high risk system engineering, dynamic monitoring of the construction process to ensure the construction safety. In recent years, with the rapid development of computer, numerical simulation has been applied gradually, through simulation calculation in advance, pre-analysis of various influencing factors in foundation pit excavation engineering, get the development trend of the construction parameters in the foundation pit engineering, provide guarantee for the smooth implementation of projects.According to the deep foundation pit engineering of Guangzhou yu a, construction monitoring and numerical simulation analysis of deep foundation pit under the anchor support system:1. According to theory of basic theory, combined with the literature, comprehensive understanding of the resarch status of the pile anchor supporting structure of deep foundation pits calculation theory and the numerical simulation, and the systematic summary.2. Elaborated the basic principle of the finite element method, and give a brief introduction to the application of the finite element method in geotechnical engineering, for a deep excavation of Guangzhou Panyu as an example, in accord with the actual situation, using MIDAS GTS NX software to establish the finite element model, and set up the structure of soil parameters and boundary conditions, establish the excavation process, set up the numerical simulation analysis of the soil horizontal displacement, the deformation of the retaining pile and the anchor shaft force of the foundation pit under the foundation pit and the pile anchor support, get the deformation trend of retaining structure of each step of the construction process, stress variation law of anchor cable, to compare the simulation results and field measured data.3. According to the results of theoretical analysis, monitoring the Horizontal displacement deformation of retaining structure and the internal force of the bolt of the excavation process, combined with the finite element calculation results, analysis of monitoring data, considering the distribution law of the Internal force of pile anchor supporting structure and the deformation under different working conditions, and this reflects the safety state of deep foundation pit, More scientific guidance for engineering construction.